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Method and apparatus for improved control of energy input during generative layer construction

A technology of equipment and thermal energy, applied in the field of building three-dimensional objects layer by layer, can solve the problems of uneven material properties, measurement technology cost, real-time data processing cost, etc.

Active Publication Date: 2019-07-16
EOS ELECTRO OPTICAL SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] WO 95 / 11100 A1 relates to the production of metal parts from metal powder and describes the problem of forming components with inhomogeneous material properties at a constant laser power
However, WO 2013 / 079581 A1 intends to avoid the relatively large measurement-technical outlay and the outlay for real-time data processing in the detection of the temperature in the vicinity of the respective point of incidence of the laser beam

Method used

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  • Method and apparatus for improved control of energy input during generative layer construction
  • Method and apparatus for improved control of energy input during generative layer construction
  • Method and apparatus for improved control of energy input during generative layer construction

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Embodiment Construction

[0026] refer to figure 1 , the device according to the invention for producing three-dimensional objects by means of a generative layer construction method is firstly described using a laser sintering device as an example.

[0027] as in figure 1 As shown in , the object 3 to be produced is produced layer by layer on a construction base plate 2 . The building floor 2 forms the bottom and the frame 1 forms the side walls of the upwardly open container in which the building process takes place. The building base plate 2 is connected to a lifting mechanism 4, which can move the building base plate in the vertical direction. The frame 1 surrounds with its upper end a build-up zone 5 in which curing takes place. Above the build area 5 is provided an applicator 11 for applying a layer of powdered build material in the build area. As powdery building materials, it is possible to use all powders which are curable by means of heat input, for example polymer powders, metal powders, ...

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Abstract

A method for the layer-by-layer construction of a three-dimensional object (3) consisting of powdery building material, wherein layers of powdery building material are solidified successively in each case at positions of a layer corresponding to at least one cross-section of the object , wherein the curing is achieved by introducing thermal energy, and the method has the step of curing all parts of the layer corresponding to the cross-section of the object, wherein at least in subregions of the layer according to The introduced thermal energy is set for the duration of the previous solidification step for the previous powder layer or according to the previously calculated duration of the current solidification step.

Description

technical field [0001] The present invention relates to a method and an associated device for layer-by-layer construction of three-dimensional objects by means of generative manufacturing. The invention relates in particular to a method of this type and a device of this type by which the precision of manufactured objects is improved. Background technique [0002] WO 95 / 11100 A1 describes a laser sintering method as a special case of the layer-by-layer generative production method. When using powders that are sintered or fused by introducing thermal energy as the starting material for fabrication, the construction process normally proceeds such that a CAD model of the object to be fabricated is made, broken down into layers, and subsequently The cross section solidifies the build material layer by layer. [0003] For each powder layer, the build process proceeds as follows: [0004] After the layer of powdered build material has been applied to the already cured layer, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C64/153B29C64/20B29C64/393B33Y30/00B33Y50/02B22F3/105
CPCB29C64/153B33Y50/02B29C64/393Y02P10/25B22F12/44B22F10/28B22F12/13B22F12/49B22F10/36B22F10/362B29C35/0288B29C35/08B33Y10/00B33Y30/00B29K2105/251
Inventor F·米勒S·帕特尔诺斯特A·弗鲁斯
Owner EOS ELECTRO OPTICAL SYST